Calling Object implementation of hashCode [duplicate]

Question

I have a hierarchy like this:

public class A {
    public abstract int hashCode();
}
public class B extends A {
    public int hashCode(){
        //I want this to return the object implementation of hash code
        return 0;
    }
}

I want b.hashCode() to return the Object implementation of hashCode(). Unfortunately B has to extend A, and A can't change.

Answer 1

Just return System.identityHashCode(this).